Аннотация:Nanocomposites based on nanocrystalline ZnO and CdSe and InP nanocrystals (quantum dots) have been synthesized by chemical precipitation and high-temperature colloidal synthesis. The microstructure parameters of the oxide matrix and the size of the CdSe and InP nanocrystals have been determined. Acorrelation was established between the spectral dependence of the photoconductivity of nanocompositesand the optical absorption spectra of quantum dots. The influence of CdSe and InP quantum dots on theinteraction of ZnO with NO2 under visible light irradiation has been studied. It has been shown that the synthesized nanocomposites can be used to detect NO2 under illumination with green light without additional thermal heating.